CN111231314B

CN111231314B - Multistation 3D printer

Info

Publication number: CN111231314B
Application number: CN202010115564.5A
Authority: CN
Inventors: 董梦瑶
Original assignee: Chongqing Industry Polytechnic College
Current assignee: Chongqing Industry Polytechnic College
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2022-01-14
Anticipated expiration: 2040-02-25
Also published as: CN111231314A

Abstract

The invention relates to a multi-station 3D printer. Comprises a box body with a table top arranged at the top, and a window arranged in the middle of the table top; a printing platform device is arranged in the box body, and a driving device and a printing device are arranged on the table board; the printing platform device comprises a mounting bottom plate fixed with the box body, and three printing platform components are mounted on the mounting bottom plate; the printing platform assembly comprises a supporting top plate positioned above, a first guide block and a second guide block positioned below, and guide rods with upper ends fixed with the supporting top plate are arranged in guide holes of the first guide block and the second guide block; a lifting motor is arranged at the center of the bottom of the supporting top plate, and a lifting guide block is arranged between the two guide blocks; the upper end of the screw rod is in butt joint connection with the lower end of an output shaft of the lifting motor, and the screw nut is fixedly connected with the lifting guide block; the printing support plate is installed on the supporting top plate, and a plurality of buffer assemblies are arranged between the supporting top plate and the printing support plate. The invention has the advantages of optimized driving mode and high production efficiency.

Description

Multistation 3D printer

Technical Field

The invention belongs to the technical field of 3D printing equipment, and particularly relates to a multi-station 3D printer.

Background

3D printing is a rapid prototyping technique, also known as additive manufacturing, which is a technique that builds objects by layer-by-layer printing using bondable materials such as powdered metal or plastic based on digital model files. 3D printing is typically achieved using digital technology material printers. The method is often used for manufacturing models in the fields of mold manufacturing, industrial design and the like, and is gradually used for directly manufacturing some products, and parts printed by the technology are already available. The technology has applications in jewelry, footwear, industrial design, construction, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

With the great development of 3D printing device technology, 3D printer devices of various structural forms have appeared on the market. The 3D printing equipment generally comprises a rack, a printing nozzle and a driving device for the printing nozzle, wherein under the driving action of the driving device, the printing nozzle is used for printing common materials such as nylon glass fibers, durable nylon materials, gypsum materials, aluminum materials, titanium alloys, stainless steel, silver plating, gold plating and rubber materials in a layer-by-layer mode, and finally, blueprints on a computer are changed into real objects, and the layered processing process is very similar to ink-jet printing. This printing technique is called a 3D stereoscopic printing technique.

3D printer among the prior art adopts the structural style of "print platform is motionless, beat printer head lifting movement" to accomplish the action that above-mentioned successive layer printed usually, this just requires for printing the shower nozzle and set up X axle drive and Y axle actuating mechanism in, still need dispose lift drive, and this action controlling means structure that leads to printing the shower nozzle is too complicated, is unfavorable for promoting the printing accuracy control to the model. On the other hand, the existing 3D printer usually only has a single-station printing mode, that is, the current model is stopped after printing is completed, the completed model is taken down and the printing platform is cleaned, and then the next printing program can be performed, which causes the printing processing efficiency of the 3D printer to be low and is difficult to meet the requirement of batch printing production of model products.

Disclosure of Invention

The invention provides the multi-station 3D printer with an optimized driving mode and high production efficiency for solving the technical problems in the prior art.

The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a multi-station 3D printer comprises a box body, wherein a table top is fixedly arranged at the top of the box body, and a window is arranged in the middle of the table top; a printing platform device is arranged in the box body and below the window, and a driving device and a printing device are arranged on the table board; the printing platform device comprises a mounting bottom plate fixed with the box body, and a left printing platform assembly, a middle printing platform assembly and a right printing platform assembly are mounted on the mounting bottom plate in parallel; the printing platform assembly comprises a supporting top plate positioned above, a first guide block and a second guide block positioned below, wherein a first guide rod of which the upper end is fixed with the supporting top plate is arranged in a guide hole of the first guide block, and a second guide rod of which the upper end is fixed with the supporting top plate is arranged in a guide hole of the second guide block; a lifting motor is arranged in the center of the bottom of the supporting top plate, and a lifting guide block is arranged between the first guide block and the second guide block; the upper end of the screw rod is in butt joint connection with the lower end of an output shaft of the lifting motor, and the screw nut is fixedly connected with the lifting guide block; the printing support plate is arranged on the supporting top plate, and a plurality of buffer assemblies are arranged between the supporting top plate and the printing support plate; the driving device comprises a left first base and a left second base which are arranged on the left side of the window, and a right first base and a right second base which are arranged on the right side of the window; a left guide rod is arranged between the left first base and the left second base, and a right guide rod is arranged between the right first base and the right second base; the printing device comprises a left base arranged on the left guide rod and a right base arranged on the right guide rod, an upper middle guide rod and a lower middle guide rod are arranged between the left base and the right base, a printing head base is arranged on the middle guide rods, and a printing head assembly is arranged on the printing head base; the printing device further comprises an X-direction driving assembly for driving the printing device to translate along the left guide rod and the right guide rod and a Y-direction driving assembly for driving the printing head base to translate along the middle guide rod.

The invention has the advantages and positive effects that: compared with the existing 3D printer equipment, the multi-station 3D printer with reasonable structural design has the advantages that the table top with the window is arranged, the left printing platform device, the middle printing platform device and the right printing platform device are arranged below the window, the whole machine is provided with three independent stations, and the printing devices can sequentially print and process models on the three stations, so that the model product processing efficiency is improved compared with the existing 3D printer equipment. The printing device and the driving device for driving the printing device to move in the X direction and the Y direction are arranged on the table board, and meanwhile, the printing platform devices are arranged to be capable of adjusting the height in the vertical direction, so that compared with the existing 3D printer equipment, the horizontal driving mechanism, the vertical driving mechanism and the lifting driving mechanism are not arranged on the printing device any more, but only the horizontal driving mechanism and the vertical driving mechanism are arranged on the printing device, and the lifting driving mechanism is arranged on the printing platform device, so that the complexity of the structure of the action control device of the printing device is simplified, the working reliability of the whole machine is higher, the position control precision of the printing device is higher, and the forming effect of a product is favorably improved.

Preferably: the X-direction driving assembly comprises a left outer side first belt pulley arranged on the left side first base, a left outer side second belt pulley arranged on the left side second base, a right outer side first belt pulley arranged on the right side first base and a right outer side second belt pulley arranged on the right side second base; a left outer side belt is arranged between the left outer side first belt pulley and the left outer side second belt pulley, a right outer side belt is arranged between the right outer side first belt pulley and the right outer side second belt pulley, the left side base is fixed with the left outer side belt, and the right side base is fixed with the right outer side belt; the first driving mechanism is used for driving the first left outer belt pulley and the first right outer belt pulley to synchronously rotate.

Preferably: the first driving mechanism comprises an upper linkage shaft arranged between the left outer side first belt pulley and the right outer side first belt pulley and an X-direction driving motor for driving the upper linkage shaft to rotate.

Preferably: the Y-direction driving assembly comprises a right inner side first belt pulley arranged on a right side first base, a right inner side second belt pulley arranged on a right side second base, two guide wheels arranged on the inner side of the right side base and a guide wheel arranged on the inner side of the left side base, a linkage belt is further arranged between the right inner side first belt pulley and the right inner side second belt pulley, the middle part of the linkage belt bypasses the guide wheel arranged on the inner side of the right side base and the guide wheel arranged on the inner side of the left side base, and the printing head base is fixed with the linkage belt; the Y-direction driving motor is used for driving the linkage belt.

Preferably: the printing head assembly comprises a preheating base fixed with a printing head base, a cooling fan is installed on the preheating base, a heating base is also installed below the preheating base, and a first material nozzle and a second material nozzle are installed at the bottom of the heating base; two groups of channels for printing wires to pass through are arranged in the preheating base and the heating base.

Preferably: a cleaning device is also arranged below the table top; the cleaning device comprises a first left bottom base and a second left bottom base which are arranged on the left side of the window, and a first right bottom base and a second right bottom base which are arranged on the right side of the window, wherein a left bottom guide rod is arranged between the first left bottom base and the second left bottom base, and a right bottom guide rod is arranged between the first right bottom base and the second right bottom base; a left shaft seat is arranged on the left guide rod at the bottom, a right shaft seat is arranged on the right guide rod at the bottom, and a cleaning shaft roller is arranged between the left shaft seat and the right shaft seat; the cleaning device also comprises a translation driving component for driving the combination body formed by the left shaft seat, the right shaft seat and the cleaning shaft roller to move in a translation manner.

Preferably: the translation driving assembly comprises belt pulleys arranged on a first left base and a second left base at the bottom, a left belt at the bottom is arranged between the belt pulleys, belt pulleys arranged on a first right base and a second right base at the bottom, a right belt at the bottom is arranged between the belt pulleys, a left shaft seat is fixed with the left belt at the bottom, and a right shaft seat is fixed with the right belt at the bottom; the first driving mechanism is used for driving the two belt pulleys on the first left base and the first right base to synchronously rotate.

Preferably: the second drive mechanism includes a lower linkage shaft between two belt pulleys located on the first left base of the bottom and the first right base of the bottom and a cleaning drive motor driving the lower linkage shaft.

Preferably: the mounting bottom plate is provided with a left through window, a middle through window and a right through window, and a first guide block, a second guide block and a lifting guide block of each of the three printing platform components are respectively positioned in the three through windows; the first guide block, the second guide block and the lifting guide block of each printing platform assembly are connected into a whole by adopting a connecting screw rod and a locking nut.

Preferably: four clapboards are further installed on the installation bottom plate, and the three printing platform assemblies are respectively located in three spaces obtained by the four clapboards in a separated mode.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the present invention with the bottom support plate removed;

FIG. 3 is a schematic structural view of the body portion of the present invention;

FIG. 4 is a schematic structural diagram of the driving device, the printing device and the cleaning device in FIG. 3;

FIG. 5 is a schematic diagram of the driving device and the printing device shown in FIG. 3;

FIG. 6 is a schematic diagram of the printing apparatus of FIG. 5;

FIG. 7 is a schematic view of the cleaning apparatus of FIG. 4;

FIG. 8 is a schematic structural view of the printhead assembly of FIG. 5;

FIG. 9 is a schematic structural view of the support platform assembly of FIG. 3;

fig. 10 is a schematic structural view of the support platform assembly of fig. 9.

In the figure:

1. a controller;

2. a box body;

3. a support leg plate;

4. a printing platform device;

4-1, installing a bottom plate; 4-2, printing the platform assembly; 4-2-1, supporting the top plate; 4-2-2, printing a supporting plate; 4-2-3, a buffer component; 4-2-4, a lifting motor; 4-2-5, a first guide rod; 4-2-6, lead screw; 4-2-7, a first guide block; 4-2-8, connecting screw; 4-2-9, a second guide rod; 4-2-10, a second guide block; 4-2-11, a lifting guide block;

5. a table top;

6. a drive device;

6-1, a right second base; 6-2, a second belt pulley at the right inner side; 6-3, a linkage belt; 6-4, right guide rod; 6-5, a sensor seat; 6-6, a right inner side first belt pulley; 6-7, driving motor in Y direction; 6-8, a right first base; 6-9, an upper linkage shaft; 6-10, driving motor in X direction; 6-11, a left first base; 6-12, a left outer first belt pulley; 6-13, left outer belt; 6-14, left guide rod; 6-15, a left second base; 6-16, a second belt pulley on the left outer side; 6-17, a right outer first belt pulley; 6-18, right outer belt; 6-19, a right outer second belt pulley;

7. a printing device;

7-1, positioning plates; 7-2, a right base; 7-3, a middle guide rod; 7-4, a printhead assembly; 7-4-1, a first guide wire tube; 7-4-2 and a second guide wire tube; 7-4-3, preheating a base; 7-4-4, a heat radiation fan; 7-4-5, heating the base; 7-4-6 and a second material nozzle; 7-4-7, a first material nozzle; 7-5, a print head base; 7-6, a left side base;

8. a cleaning device;

8-1, cleaning the shaft roller; 8-2, a bottom right guide rod; 8-3, a right belt at the bottom; 8-4, right side axle seat; 8-5, cleaning a driving motor; 8-6, a bottom first right side base; 8-7, a bottom first left base; 8-8 of left side shaft seat; 8-9 parts of a left belt at the bottom; 8-10 parts of a left guide rod at the bottom; 8-11, a second left base at the bottom; 8-12, belt pulleys; 8-13, bottom second right base.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are described in detail.

Referring to fig. 1, 2 and 3, the multi-station 3D printer of the present invention includes a box body 2 having a table top 5 fixed on the top thereof, and a window provided in the middle of the table top 5; a printing table device 4 is mounted in the case 2 below the window, and a driving device 6 and a printing device 7 are mounted on the table 5.

The box body 2 is used as a support of the whole machine and is formed by welding and building a thick metal plate (containing a front side plate, a rear side plate, a left side plate and a right side plate and not containing a bottom plate, namely, the bottom of the box body is open), the table board 5 is made of the thick metal plate, a window is obtained by cutting through a laser cutting machine, and as shown in fig. 1 and 2, the top edge of the box body 2 is flush with the upper surface of the table board 5. In order to make the whole machine more stable and lift the whole machine to a certain height, as shown in fig. 1, support leg plates 3 are respectively arranged at two sides of the front part and two sides of the rear part of the box body 2, the whole box body 2 is supported by the four support leg plates 3, the support width of the bottom of the box body 2 is enlarged, and therefore the stability is improved, and the top edges of the support leg plates 3 are welded and fixed with the front side plate and the rear side plate of the box body 2.

Printing platform device 4 is as the platform of bearing printing model, and printing device 7 directly prints on printing platform device 4, and drive arrangement 6 drive printing device 7 translation removes.

Referring to fig. 9 and 10, it can be seen that: the printing platform device 4 comprises a mounting bottom plate 4-1 fixed with the box body 2, a left printing platform assembly 4-2, a middle printing platform assembly 4-1 and a right printing platform assembly 4-2 are mounted on the mounting bottom plate 4-1 in parallel, the mounting bottom plate 4-1 serves as a supporting plate of the three printing platform assemblies 4-2, the outer contour of the mounting bottom plate 4-1 is consistent with the cross section contour of an inner cavity of the box body 2, and the peripheral edges of the mounting bottom plate 4-1 are welded and fixed with a front side plate, a rear side plate, a left side plate and a right side plate which form the box body 2. The three printing platform assemblies 4-2 form three parallel stations for printing and processing by the printing device 7, the printing device 7 is moved to the next platform for printing after printing a product on one platform, and a formed product on the previous platform can be taken down, so that the time wasted in the process of moving the printing device 7 away, taking the formed product down and resetting the printing device 7 is saved, and the production efficiency of the whole machine is improved.

The printing platform assembly 4-2 comprises a supporting top plate 4-2-1 positioned above, a first guide block 4-2-7 and a second guide block 4-2-10 positioned below, wherein a first guide rod 4-2-5 with the upper end fixed with the supporting top plate 4-2-1 is arranged in a guide hole of the first guide block 4-2-7, and a second guide rod 4-2-9 with the upper end fixed with the supporting top plate 4-2-1 is arranged in a guide hole of the second guide block 4-2-10. As shown in fig. 10, two fixing blocks are fixedly mounted (welded) at the bottom of the top supporting plate 4-2-1, the fixing blocks are divided into a front part and a rear part (forming a front clamping plate and a rear clamping plate), and the upper ends of the first guide rod 4-2-5 and the second guide rod 4-2-9 are respectively clamped between the front clamping plate and the rear clamping plate of the two fixing blocks and fastened by bolts.

The center of the bottom of the supporting top plate 4-2-1 is provided with a lifting motor 4-2-4 (the motor shell of the lifting motor 4-2-4 is fixedly connected with the supporting top plate 4-2-1), and a lifting guide block 4-2-11 is arranged between the first guide block 4-2-7 and the second guide block 4-2-10. The lifting guide block is characterized by further comprising a lead screw 4-2-6 with a nut, wherein the upper end of the lead screw is in butt joint with the lower end of an output shaft of the lifting motor 4-2-4 (in butt joint by adopting a coupler), and the nut is fixedly connected with the lifting guide block 4-2-11. Therefore, when the lifting motor 4-2-4 drives the screw rod 4-2-6 to rotate, the supporting top plate 4-2-1 and the accessory components (including the lifting motor 4-2-4) perform lifting movement, the first guide rod 4-2-5 and the second guide rod 4-2-9 perform lifting movement along the first guide block 4-2-7 and the second guide block 4-2-10 respectively, and the lifting movement of the supporting top plate 4-2-1 and the accessory components is more stable due to the cooperation between the guide rods and the guide blocks.

In this embodiment, as shown in fig. 9, three through windows, namely, a left through window, a middle through window and a right through window, are arranged on the installation bottom plate 4-1, and the first guide block 4-2-7, the second guide block 4-2-10 and the lifting guide block 4-2-11 of each of the three printing platform assemblies 4-2 are respectively positioned in the three through windows; specifically, as shown in fig. 10, the first guide block 4-2-7, the second guide block 4-2-10 and the elevating guide block 4-2-11 of each printing platform assembly 4-2 are connected into a whole by the connecting screw 4-2-8 and the locking nut. The first guide block 4-2-7, the second guide block 4-2-10 and the lifting guide block 4-2-11 are respectively provided with a connecting hole which is transversely communicated, the connecting screw rod 4-2-8 is inserted into the corresponding connecting hole, and locking nuts are respectively arranged on the connecting screw rod 4-2-8, the first guide block 4-2-7, the second guide block 4-2-10 and the lifting guide block 4-2-11 at two sides for locking and fixing, so that the connecting screw rod 4-2-8, the first guide block 4-2-7, the second guide block 4-2-10 and the lifting guide block 4-2-11 form a whole.

The first guide block 4-2-7 and the second guide block 4-2-10 of each printing platform assembly 4-2 are fixedly connected with the mounting base plate 4-1 by bolts, as shown in fig. 10, a through hole is formed in the middle of the lifting guide block 4-2-11, the lower end of the lead screw 4-2-6 penetrates through the through hole, and a screw nut is located below the lifting guide block 4-2-11 and is fixedly connected with the lifting guide block 4-2-11 by a plurality of screws.

The printing supporting plate 4-2-2 is arranged on the supporting top plate 4-2-1, the printing supporting plate 4-2-2 is used as a supporting substrate of a model product, the printing device 7 directly prints and forms the product on the printing supporting plate 4-2-2, a plurality of buffer assemblies 4-2-3 are arranged between the supporting top plate 4-2-1 and the printing supporting plate 4-2-2, each buffer assembly 4-2-3 is used for providing a certain buffer function for the printing supporting plate 4-2-2, in the actual operation process, as the height of the printing platform device 4 is controllably lifted, the printing device 7 is positioned above the printing platform device (namely positioned above the printing supporting plate 4-2-2), the distance between the printing head assembly 7-4 of the printing device 7 and the printing supporting plate 4-2-2 is very close during printing, in extreme cases such as the case of controller failure, the printing platform device 4 may generate excessive lifting displacement, which may result in contact with the printing device 7, and if the printing platform device 4 is of a completely rigid structure, the fragile and expensive printing device 7 may be damaged by impact, so that by disposing the buffer assembly 4-2-3 between the supporting top plate 4-2-1 and the printing pallet 4-2-2, a certain protection effect may be exerted on the printing device 7 in the extreme cases. In the extreme case other than the above, that is, in the normal printing condition, since the weight of the product supported by the printing platform device 4 is small, the buffer member 4-2-3 is sufficient to support the printing pallet 4-2-2 in a stable state, and thus, the printing precision is not affected.

In this embodiment, as shown in fig. 10, four buffer assemblies 4-2-3 are provided, and are respectively located at four corners of the supporting top plate 4-2-1 and the printing support plate 4-2-2, and structurally, the buffer assemblies 4-2-3 include buffer guide rods, the upper ends of which are fixedly connected with the lower surface of the printing support plate 4-2-2, springs are sleeved outside the buffer guide rods, guide holes are formed at corresponding positions of the supporting top plate 4-2-1, and buffer guide sleeves are installed at the bottoms of the guide rods, and the buffer guide rods are located in the corresponding buffer guide sleeves.

In this embodiment, referring to fig. 3, four partition plates are further mounted on the mounting base plate 4-1, the three printing platform assemblies 4-2 are respectively located in three spaces obtained by dividing the four partition plates, the bottom edge of each partition plate is welded and fixed to the upper surface of the mounting base plate 4-1, the partition plates are vertically arranged, and the top edges of the partition plates are flush with the upper surface of the table top 5. The four clapboards provide mutual isolation for the three printing platform assemblies 4-2, so that each printing platform assembly 4-2 can move up and down in respective isolation space, meanwhile, each clapboard can also be regarded as a limiting board positioned at two sides when the printing platform assembly 4-2 moves up and down, and the edges at two sides of the printing support plate 4-2-2 respectively abut against the surfaces of the clapboards at two sides and contact with the surfaces of the clapboards to slide and move when the printing platform assembly 4-2 moves up and down, thereby further improving the stability and position precision when the printing support plate 4-2-2 moves up and down, and being beneficial to improving the printing precision of products.

Referring to fig. 4, 5 and 6, the driving device 6 includes a left first base 6-11 and a left second base 6-15 installed at the left side of the window and a right first base 6-8 and a right second base 6-1 installed at the right side of the window; a left guide rod 6-14 is arranged between the left first base 6-11 and the left second base 6-15, and a right guide rod 6-4 is arranged between the right first base 6-8 and the right second base 6-1. The left first base 6-11, the left second base 6-15, the right first base 6-8 and the right second base 6-1 are all fixed with the table top 5 by bolts.

The printing device 7 comprises a left base 7-6 arranged on a left guide rod 6-14 and a right base 7-2 arranged on a right guide rod 6-4, an upper middle guide rod 7-3 and a lower middle guide rod 7-3 are arranged between the left base and the right base, a printing head base 7-5 is arranged on the middle guide rod 7-3, and a printing head assembly 7-4 is arranged on the printing head base 7-5. And the printing device also comprises an X-direction driving assembly for driving the printing device 7 to translate along the left guide rod 6-14 and the right guide rod 6-4 and a Y-direction driving assembly for driving the printing head base 7-5 to translate along the middle guide rod 7-3. Under the driving action of the X-direction driving assembly and the Y-direction driving assembly, the printing head assembly 7-4 has the capability of transversely moving along the left guide rod 6-14 and the right guide rod 6-4 and longitudinally moving along the middle guide rod 7-3.

The print head base 7-5 is used for mounting the print head assembly 7-4, and considering that the mounting height of the print head assembly 7-4 needs to be adjusted within a certain range according to production needs, a plurality of mounting positions should be arranged on the print head base 7-5, and the print head assembly 7-4 is fixedly connected with one of the mounting positions of the print head base 7-5 in a detachable connection mode, and the typical mode is as follows: a strip-shaped hole is formed in the printing head base 7-5, the printing head component 7-4 is fixedly connected with the printing head base 7-5 through a detachable bolt, and therefore the whole height of the printing head component 7-4 can be adjusted by loosening or screwing the bolt.

Referring to fig. 4 and 5, it can be seen that: the X-direction driving assembly comprises a left outer first belt pulley 6-12 arranged on the left first base 6-11, a left outer second belt pulley 6-16 arranged on the left second base 6-15, a right outer first belt pulley 6-17 arranged on the right first base 6-8 and a right outer second belt pulley 6-19 arranged on the right second base 6-1; a left outer belt 6-13 is arranged between the left outer first belt pulley 6-12 and the left outer second belt pulley 6-16, a right outer belt 6-18 is arranged between the right outer first belt pulley 6-17 and the right outer second belt pulley 6-19, the left base 7-6 is fixed with the left outer belt 6-13, and the right base 7-2 is fixed with the right outer belt 6-18. The printing device also comprises a first driving mechanism for driving the left outer side first belt pulley 6-12 and the right outer side first belt pulley 6-17 to synchronously rotate, under the driving action of the first driving mechanism, the left outer side first belt pulley 6-12 and the right outer side first belt pulley 6-17 synchronously rotate, so that the left outer side second belt pulley 6-16 and the right outer side second belt pulley 6-19 synchronously rotate, the left outer side belt 6-13 and the right outer side belt 6-18 synchronously move, and therefore the left side base 7-6 and the right side base 7-2 synchronously move, so that the printing device 7 as a whole stably moves transversely.

Further, the first driving mechanism comprises an upper linkage shaft 6-9 installed between the left outer first belt pulley 6-12 and the right outer first belt pulley 6-17 and an X-direction driving motor 6-10 for driving the upper linkage shaft 6-9 to rotate. The transmission mode between the upper linkage shaft 6-9 and the X-direction driving motor 6-10 can be diversified, such as: (1) bevel gears are arranged on the upper universal driving shaft 6-9 and a motor shaft of the X-direction driving motor 6-10, and the two bevel gears form a bevel gear set for transmission; (2) the motor shaft of the X-direction driving motor 6-10 penetrates through the shell, one end of the upper linkage shaft 6-9 is in butt joint with the inner end of the wheel shaft of the right outer side first belt pulley 6-17, the other end of the upper linkage shaft is in butt joint with the inner end of the motor shaft of the X-direction driving motor 6-10, and the outer end of the motor shaft of the X-direction driving motor 6-10 is in butt joint with the inner end of the wheel shaft of the left outer side first belt pulley 6-12.

Referring to fig. 4 and 6, it can be seen that: the Y-direction driving assembly comprises a right inner side first belt pulley 6-6 installed on a right side first base 6-8, a right inner side second belt pulley 6-2 installed on a right side second base 6-1, two guide wheels installed on the inner side of the right side base 7-2 and a guide wheel installed on the inner side of the left side base 7-6, a linkage belt 6-3 is further arranged between the right inner side first belt pulley 6-6 and the right inner side second belt pulley 6-2, the middle portion of the linkage belt 6-3 bypasses the guide wheel on the inner side of the right side base 7-2 and the guide wheel on the inner side of the left side base 7-6, and the printing head base 7-5 is fixed with the linkage belt 6-3. The printing head base is characterized by further comprising a Y-direction driving motor 6-7 for driving the linkage belt 6-3, wherein the linkage belt 6-3 moves on a set path under the driving action of the Y-direction driving motor 6-7, and the printing head base 7-5 moves longitudinally along the middle guide rod 7-3 under the pulling action of the linkage belt 6-3.

The particular connection of the linkage belt 6-3 is given in fig. 6, where it can be seen that: the whole shape of the linkage belt 6-3 is T-shaped, one end of the linkage belt 6-3 is fixed with the printing head base 7-5, then the linkage belt firstly bypasses a guide wheel on the inner side of the left base 7-6, then bypasses one guide wheel on the inner side of the right base 7-2, then bypasses the first belt pulley 6-6 on the inner side of the right, then bypasses the second belt pulley 6-2 on the inner side of the right, then bypasses the other guide wheel on the inner side of the right base 7-2, and then the end part is fixed on the printing head base 7-5 again.

The Y-direction driving motor 6-7 can directly drive the right inner side first belt pulley 6-6 or the right inner side second belt pulley 6-2 to rotate, and the driving movement of the linkage belt 6-3 is realized.

Referring to fig. 8, the print head assembly 7-4 includes a preheating base 7-4-3 fixed to the print head base 7-5, a heat dissipating fan 7-4-4 is installed on the preheating base 7-4-3, a heating base 7-4-5 is also installed below the preheating base 7-4-3, and a first nozzle 7-4-7 and a second nozzle 7-4-6 are installed at the bottom of the heating base 7-4-5. Two groups of channels for printing wires to pass through are arranged in the preheating base 7-4-3 and the heating base 7-4-5, furthermore, as shown in fig. 8, the upper ends of the two groups of channels of the preheating base 7-4-3 are connected with a first wire guide pipe 7-4-1 and a second wire guide pipe 7-4-2 in an inserting manner, when in use, the printing wires penetrate through the first wire guide pipe 7-4-1 and the second wire guide pipe 7-4-2, are heated by the preheating base 7-4-3, are further heated and melted by the heating base 7-4-5, and are finally discharged from the first material nozzle 7-4-7 and the second material nozzle 7-4-6.

As described above, the preheating base 7-4-3 is detachably fixed to the head base 7-5 by bolts, thereby enabling height adjustment. The heat radiation fan 7-4-4 is used for air-cooling the preheating base 7-4-3 to avoid the situation that the printing wire starts to melt in the channel inside the preheating base 7-4-3 due to the overhigh temperature, and the printing wire should start to melt in the channel of the heating base 7-4-5, so that when the printing wire is continuously supplied to the printing head assembly 7-4 through the first wire guide pipe 7-4-1 and the second wire guide pipe 7-4-2, the upper unmelted printing wire plays a certain role in extruding the lower melted printing wire, and under the stable conveying action of external equipment such as a wire feeder, the material nozzle ejects the melted printing wire.

The effect that sets up two material mouths realizes one and one being equipped with, because the material mouth takes place to block up easily in printing the course of working, the influence is printed the process of production, consequently can effectively reduce because the material mouth blocks up the shut down that leads to long through setting up two material mouths, current material mouth blocks up the back, and the model product of current printing is abandoned, moves to next station behind another material mouth and prints production, shuts down when suitable and clears up the material mouth that blocks up.

In the prior art, a plurality of printing head assemblies 7-4 are available and can be purchased, and the obtained printing head assemblies 7-4 can be directly installed on the printing head base 7-5 of the 3D printer, so that the selection of the printing head assemblies 7-4 needs to be combined with the printing requirements of products, and further description of other structures of the printing head assemblies 7-4 is omitted in the patent.

Considering that after the printing and molding of the product are completed, when the product is taken off from the printing pallet 4-2-2 of the printing platform assembly 4-2, some residues generated in the printing process may remain on the surface of the printing pallet 4-2-2, and the residues need to be removed before the printing production of the product is continued to ensure that the surface of the printing pallet 4-2-2 is as clean as possible, in order to make the 3D printer have the self-cleaning function, a cleaning device 8 is further installed below the table top 5 in this embodiment, please refer to fig. 1 to 3.

Referring to fig. 7, it can be seen that: the cleaning device 8 comprises a first left bottom base 8-7 and a second left bottom base 8-11 which are arranged on the left side of the window, and a first right bottom base 8-6 and a second right bottom base 8-13 which are arranged on the right side of the window, a left bottom guide rod 8-10 is arranged between the first left bottom base 8-7 and the second left bottom base 8-11, and a right bottom guide rod 8-2 is arranged between the first right bottom base 8-6 and the second right bottom base 8-13. The first left base 8-7 at the bottom, the second left base 8-11 at the bottom, the first right base 8-6 at the bottom and the second right base 8-13 at the bottom are all fixed with the table top 5 by bolts.

A left shaft seat 8-8 is arranged on the bottom left guide rod 8-10, a right shaft seat 8-4 is arranged on the bottom right guide rod 8-2, and a cleaning shaft roller 8-1 is arranged between the left shaft seat 8-8 and the right shaft seat 8-4; the cleaning device also comprises a translation driving component for driving a combined body formed by the left shaft seat 8-8, the right shaft seat 8-4 and the cleaning roller 8-1 to move in a translation manner. Under the driving action of the translation driving assembly, the cleaning shaft roller 8-1 is carried by the left shaft seat 8-8 and the right shaft seat 8-4 to translate transversely, and the cleaning shaft roller 8-1 rolls over the surfaces of the printing support plates 4-2-2 of the three printing platform assemblies 4-2 to clean the surfaces of the printing support plates 4-2-2.

Specifically, shaft seats are respectively arranged on the left shaft seat 8-8 and the right shaft seat 8-4, and two ends of a roll shaft of the cleaning roll shaft 8-1 are respectively arranged on the two shaft seats, so that the cleaning roll shaft 8-1 can flexibly rotate. The cleaning method is selected to be an adhesion cleaning method, namely, the surface of the cleaning shaft roller 8-1 is enabled to have viscosity, specifically, a viscous outer layer made of cleaning glue can be arranged on the roller body of the cleaning shaft roller 8-1, and the cleaning glue is widely applied to cleaning products at present. When the cleaning roller 8-1 rolls over the surface of the printing support plate 4-2-2, the particle impurities on the printing support plate 4-2-2 can be adhered down. After a plurality of times of cleaning, the cleaning capability is weakened due to the reduction of the viscosity of the cleaning roller 8-1, at this time, the cleaning roller 8-1 is detached from the left shaft seat 8-8 and the right shaft seat 8-4 and the viscous outer layer on the surface is replaced, the cleaning roller 8-1 with the viscous outer layer replaced is remounted on the left shaft seat 8-8 and the right shaft seat 8-4, and then the cleaning capability of the cleaning device 8 is recovered.

Referring to fig. 7, it can be seen that: the translation driving component comprises belt pulleys 8-12 arranged on a first left base 8-7 and a second left base 8-11, a left bottom belt 8-9 is arranged between the two belt pulleys 8-12, belt pulleys 8-12 arranged on a first right base 8-6 and a second right base 8-13 are arranged between the two belt pulleys 8-12, a right bottom belt 8-3 is arranged between the two belt pulleys 8-12, the left shaft seat 8-8 is fixed with the left bottom belt 8-9, and the right shaft seat 8-4 is fixed with the right bottom belt 8-3. And a second driving mechanism for driving the two pulleys 8-12 on the first left base 8-7 and the first right base 8-6 to synchronously rotate. Under the driving action of the second driving mechanism, the two belt pulleys 8-12 on the bottom first left base 8-7 and the bottom first right base 8-6 rotate synchronously, so that the bottom left belt 8-9 and the bottom right belt 8-3 move synchronously, and the left shaft seat 8-8 and the right shaft seat 8-4 move synchronously, so that the cleaning device 8 as a whole moves transversely stably to generate a cleaning action.

When the cleaning device 8 is unable to provide a thorough cleaning action (which typically corresponds to the situation where the printing material sticks to the print pallet 4-2-2), manual cooperation is required to achieve surface cleaning of the print pallet 4-2-2.

In this embodiment, the second driving mechanism includes a lower link shaft between two pulleys 8-12 on the bottom first left base 8-7 and the bottom first right base 8-6, and a cleaning driving motor 8-5 driving the lower link shaft. The transmission between the lower linkage shaft and the cleaning drive motor 8-5 can be varied, for example: (1) bevel gears are arranged on the lower universal driving shaft and on a motor shaft of the cleaning driving motor 8-5, and the two bevel gears form a bevel gear set for transmission; (2) a motor shaft of the cleaning driving motor 8-5 penetrates through a machine shell of the cleaning driving motor, one end of a lower linkage shaft is in butt joint with the inner end of a wheel shaft of a belt pulley 8-12 of a first right base 8-6 at the bottom, the other end of the lower linkage shaft is in butt joint with the inner end of a motor shaft of the cleaning driving motor 8-5, and the outer end of the motor shaft of the cleaning driving motor 8-5 is in butt joint with the inner end of a wheel shaft of a belt pulley 8-12 of a first left base 8-7 at the bottom.

In this embodiment, in order to correct the horizontal initial position and the vertical initial position of the print head assembly 7-4 to improve the resetting capability of the print head assembly 7-4 and further improve the precision in the printing process, a position correction assembly, including a horizontal correction assembly and a vertical correction assembly, may be configured for the printing apparatus 7. Referring to fig. 4, it can be seen that the transverse correction assembly includes a sensor seat 6-5 mounted on a first base 6-8 on the right side, a photoelectric sensor is mounted on the sensor seat 6-5, a positioning plate 7-1 is mounted on a base 7-2 on the right side, and the transverse initial position is corrected by the cooperation of the positioning plate 7-1 and the photoelectric sensor when the base 7-2 on the right side moves transversely; similarly, the longitudinal correction assembly comprises a photoelectric sensor arranged on the printing head base 7-5, another positioning plate 7-1 is arranged on the right side base 7-2, and the longitudinal initial position correction is realized through the cooperation of the positioning plate 7-1 and the photoelectric sensor when the printing head assembly 7-4 moves longitudinally.

The work of above-mentioned initial position correction is all carried out when starting print job at every turn, promotes the precision of printing processing.

As shown in fig. 1, the 3D printer further includes a controller 1, the controller 1 is installed below the edge of the table top 5, and includes a key group, a display screen, and a control circuit board, and the X-direction driving motor 6-10, the Y-direction driving motor 6-7, the cleaning driving motor 8-5, the lifting motors 4-2-4, and the photoelectric sensors are all electrically connected to the control circuit board. The controller 1 should further include a wired or wireless communication unit for acquiring the printing model data from the upper computer through a data bus or wireless transmission.

The working process is as follows:

initially, printhead assembly 7-4 is in a zero position, in which printhead assembly 7-4 is above the upper left corner of print pallet 4-2-2 of leftmost print platform assembly 4-2, and cleaning device 8 is located to the side of leftmost print platform assembly 4-2;

sending the printing model data to the controller 1 through an upper computer, wherein the printing models comprise three printing stations which are arranged in parallel and respectively correspond to the three printing stations, and starting the printer to enter a printing program through the controller 1; the driving device 6 and the printing device 7 drive the printing head assembly 7-4 to move along a data path in a plane range, and the printing platform assembly 4-2 is matched with the printing head assembly 7-4 to slightly descend layer by layer in the vertical direction to finish the layer-by-layer printing and forming of a product;

after the product at the leftmost station is printed, the printing head assembly 7-4 is moved to the printing platform assembly 4-2 at the middle position for printing and processing, at the moment, an operator lifts the printing platform assembly 4-2 at the left side through the controller 1, and after the printing platform assembly is lifted to the high position, the model product on the printing supporting plate 4-2-2 is taken down; when the printing of the product on the printing platform assembly 4-2 at the middle position is finished, the printing head assembly 7-4 is moved to the printing platform assembly 4-2 at the right side for printing, at the moment, an operator lifts the printing platform assembly 4-2 at the middle position through the controller 1, and the model product on the printing support plate 4-2-2 is taken down after the printing platform assembly is lifted to the high position; when printing of a product on the printing platform assembly 4-2 at the right side position is finished, the printing head assembly 7-4 is moved to the printing platform assembly 4-2 at the left side position for printing and processing, at the moment, an operator lifts the printing platform assembly 4-2 at the right side through the controller 1, and takes down a model product on the printing support plate 4-2-2 after lifting to a high position; repeating the printing and processing processes of the stations to finish the continuous printing, production and processing of the product;

the surface cleaning work of each printing platform assembly 4-2 is carried out once every a period of time, when the cleaning work is carried out, the printing operation is suspended, the cleaning device 8 is instructed by the controller 1 to transversely reciprocate for a plurality of times and finally stays at the original position, impurities are adhered to the viscous outer layer of the cleaning shaft roller 8-1, and the hard stains on the printing support plate 4-2-2 are manually cleaned in the process; when the adhesive performance of the tacky outer layer of the cleaning roll 8-1 is reduced to a certain degree, the tacky outer layer is replaced.

Claims

1. The utility model provides a multistation 3D printer, characterized by: comprises a box body (2) with a table-board (5) fixed on the top, and a window is arranged in the middle of the table-board (5); a printing platform device (4) is arranged in the box body (2) and below the window, and a driving device (6) and a printing device (7) are arranged on the table top (5);

the printing platform device (4) comprises a mounting bottom plate (4-1) fixed with the box body (2), and three printing platform assemblies (4-2) of a left printing platform assembly, a middle printing platform assembly and a right printing platform assembly are mounted on the mounting bottom plate (4-1) in parallel; the printing platform assembly (4-2) comprises a supporting top plate (4-2-1) positioned above, a first guide block (4-2-7) and a second guide block (4-2-10) positioned below, wherein a first guide rod (4-2-5) with the upper end fixed with the supporting top plate (4-2-1) is arranged in a guide hole of the first guide block (4-2-7), and a second guide rod (4-2-9) with the upper end fixed with the supporting top plate (4-2-1) is arranged in a guide hole of the second guide block (4-2-10); a lifting motor (4-2-4) is arranged at the center of the bottom of the supporting top plate (4-2-1), and a lifting guide block (4-2-11) is arranged between the first guide block (4-2-7) and the second guide block (4-2-10); the lifting mechanism also comprises a lead screw (4-2-6) with a nut, the upper end of the lead screw is in butt joint connection with the lower end of an output shaft of the lifting motor (4-2-4), and the nut is fixedly connected with the lifting guide block (4-2-11); a printing supporting plate (4-2-2) is arranged on the supporting top plate (4-2-1), and a plurality of buffer assemblies (4-2-3) are arranged between the supporting top plate (4-2-1) and the printing supporting plate (4-2-2);

the driving device (6) comprises a left first base (6-11) and a left second base (6-15) which are arranged on the left side of the window, and a right first base (6-8) and a right second base (6-1) which are arranged on the right side of the window; a left guide rod (6-14) is arranged between the left first base (6-11) and the left second base (6-15), and a right guide rod (6-4) is arranged between the right first base (6-8) and the right second base (6-1);

the printing device (7) comprises a left base (7-6) arranged on a left guide rod (6-14) and a right base (7-2) arranged on a right guide rod (6-4), an upper middle guide rod and a lower middle guide rod (7-3) are arranged between the left base and the right base, a printing head base (7-5) is arranged on the middle guide rod (7-3), and a printing head assembly (7-4) is arranged on the printing head base (7-5);

the printing device also comprises an X-direction driving assembly for driving the printing device (7) to translate along the left guide rod (6-14) and the right guide rod (6-4) and a Y-direction driving assembly for driving the printing head base (7-5) to translate along the middle guide rod (7-3);

the X-direction driving assembly comprises a left outer side first belt pulley (6-12) arranged on a left side first base (6-11), a left outer side second belt pulley (6-16) arranged on a left side second base (6-15), a right outer side first belt pulley (6-17) arranged on a right side first base (6-8) and a right outer side second belt pulley (6-19) arranged on a right side second base (6-1); a left outer side belt (6-13) is arranged between the left outer side first belt pulley (6-12) and the left outer side second belt pulley (6-16), a right outer side belt (6-18) is arranged between the right outer side first belt pulley (6-17) and the right outer side second belt pulley (6-19), the left side base (7-6) is fixed with the left outer side belt (6-13), and the right side base (7-2) is fixed with the right outer side belt (6-18); the first driving mechanism is used for driving the left outer side first belt pulley (6-12) and the right outer side first belt pulley (6-17) to synchronously rotate;

the first driving mechanism comprises an upper linkage shaft (6-9) arranged between a left outer side first belt pulley (6-12) and a right outer side first belt pulley (6-17) and an X-direction driving motor (6-10) for driving the upper linkage shaft (6-9) to rotate;

the Y-direction driving assembly comprises a right inner side first belt pulley (6-6) arranged on a right side first base (6-8), a right inner side second belt pulley (6-2) arranged on a right side second base (6-1), two guide wheels arranged on the inner side of the right side base (7-2) and a guide wheel arranged on the inner side of the left side base (7-6), a linkage belt (6-3) is further arranged between the right inner side first belt pulley (6-6) and the right inner side second belt pulley (6-2), the middle part of the linkage belt (6-3) bypasses the guide wheel on the inner side of the right side base (7-2) and the guide wheel on the inner side of the left side base (7-6), and the printing head base (7-5) is fixed with the linkage belt (6-3); also comprises a Y-direction driving motor (6-7) for driving the linkage belt (6-3).

2. A multi-station 3D printer as claimed in claim 1, wherein: the printing head assembly (7-4) comprises a preheating base (7-4-3) fixed with the printing head base (7-5), a heat radiation fan (7-4-4) is installed on the preheating base (7-4-3), a heating base (7-4-5) is also installed below the preheating base (7-4-3), and a first material nozzle (7-4-7) and a second material nozzle (7-4-6) are installed at the bottom of the heating base (7-4-5); two groups of channels for printing wires to pass through are arranged in the preheating base (7-4-3) and the heating base (7-4-5).

3. A multi-station 3D printer as claimed in claim 2, wherein: a cleaning device (8) is also arranged below the table top (5); the cleaning device (8) comprises a first left bottom base (8-7) and a second left bottom base (8-11) which are arranged on the left side of the window, and a first right bottom base (8-6) and a second right bottom base (8-13) which are arranged on the right side of the window, a left bottom guide rod (8-10) is arranged between the first left bottom base (8-7) and the second left bottom base (8-11), and a right bottom guide rod (8-2) is arranged between the first right bottom base (8-6) and the second right bottom base (8-13); a left side shaft seat (8-8) is arranged on the left guide rod (8-10) at the bottom, a right side shaft seat (8-4) is arranged on the right guide rod (8-2) at the bottom, and a cleaning shaft roller (8-1) is arranged between the left side shaft seat (8-8) and the right side shaft seat (8-4); the cleaning device also comprises a translation driving component for driving a combination body formed by the left shaft seat (8-8), the right shaft seat (8-4) and the cleaning shaft roller (8-1) to move in a translation manner.

4. A multi-station 3D printer as claimed in claim 3, wherein: the translation driving component comprises belt pulleys (8-12) arranged on a first left base (8-7) and a second left base (8-11) at the bottom, a left belt (8-9) at the bottom is arranged between the two belt pulleys (8-12), belt pulleys (8-12) arranged on a first right base (8-6) at the bottom and a second right base (8-13) at the bottom are arranged between the two belt pulleys (8-12), a right belt (8-3) at the bottom is arranged between the two belt pulleys (8-12), a left shaft seat (8-8) is fixed with the left belt (8-9) at the bottom, and a right shaft seat (8-4) is fixed with the right belt (8-3) at the bottom; the device also comprises a second driving mechanism for driving two belt pulleys (8-12) on the first left base (8-7) and the first right base (8-6) to synchronously rotate.

5. A multi-station 3D printer as claimed in claim 4, wherein: the second driving mechanism comprises a lower linkage shaft between two belt pulleys (8-12) on the bottom first left base (8-7) and the bottom first right base (8-6) and a cleaning driving motor (8-5) for driving the lower linkage shaft.

6. A multi-station 3D printer as claimed in claim 5, wherein: the mounting bottom plate (4-1) is provided with a left through window, a middle through window and a right through window, and a first guide block (4-2-7), a second guide block (4-2-10) and a lifting guide block (4-2-11) of each of the three printing platform components (4-2) are respectively positioned in the three through windows; the first guide block (4-2-7), the second guide block (4-2-10) and the lifting guide block (4-2-11) of each printing platform assembly (4-2) are connected into a whole by a connecting screw rod (4-2-8) and a lock nut.

7. A multi-station 3D printer as claimed in claim 6, wherein: four partition plates are further mounted on the mounting bottom plate (4-1), and the three printing platform assemblies (4-2) are respectively positioned in three spaces obtained by the four partition plates in a separated mode.